<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app">
         请输入用户名:<input type="text" v-model="uname">
    </div>
   
    <script src="./vue2.js"></script>
    <script>
     var vm = new Vue({
         el:"#app",
         data:{
             uname:"",
         }
     })   
    </script>
</body>
</html>